GCN District Level Licensing Risk Zones Explained: Red, Amber and Green

Great crested newts are one of the most common ecological constraints on development sites in England. But the licensing system that governs them changed significantly with the introduction of District Level Licensing - and many developers and ecologists are still confused by the risk zone maps.

This guide explains what the Red, Amber and Green GCN risk zones mean, how to check which zone your site falls in, what surveys are required in each zone, and how DLL compares to traditional mitigation licensing.

What Are Great Crested Newts?

Great crested newts (Triturus cristatus) are a European Protected Species under the Conservation of Habitats and Species Regulations 2017 and Schedule 5 of the Wildlife and Countryside Act 1981. It is a criminal offence to kill, injure, capture or disturb GCN, or to damage or destroy their breeding sites or resting places.

GCN are found across England and Wales. They breed in ponds during spring but spend most of their lives on land, in rough grassland, woodland, hedgerows, and gardens within about 500m of their breeding ponds. This means development sites that don't have ponds on them can still affect GCN if there are ponds nearby.

What Is District Level Licensing?

District Level Licensing (DLL) is an alternative approach to the traditional mitigation licensing route for developments that may affect GCN. Under DLL, Natural England uses data modelling to predict GCN distribution across an area and maps it into risk zones. Developers can then make a financial contribution to strategic habitat creation rather than carrying out individual site-level surveys.

The key advantage of DLL is speed. Traditional GCN licensing can take months - you need multiple survey visits (minimum 4-6 between mid-March and mid-June), then a licence application to Natural England, then approval before works can start. DLL can reduce this to weeks.

DLL is currently available in many parts of England, operated either directly by Natural England or through NatureSpace Partnership in the South Midlands. Coverage is expanding. Check the GOV.UK DLL page for the latest list of participating local planning authorities.

The Three Risk Zones

Natural England's risk zone maps classify land into three categories based on modelled GCN habitat suitability and population data:

Red Zone - High Risk

What it means: The site is in an area of highly suitable GCN habitat. GCN populations of regional, national, or international importance are likely to be present.

Survey requirements: Traditional GCN surveys are required. Developers cannot use DLL in red zones. A full mitigation licence from Natural England will be needed if GCN are found.

What to expect: HSI assessment of all ponds within 500m, followed by presence/absence surveys (4-6 visits, mid-March to mid-June) or eDNA (15 April to 30 June). If GCN are detected, a population class assessment and European Protected Species mitigation licence will be required.

Amber Zone - Moderate Risk

What it means: The site is in an area of suitable GCN habitat where populations are likely to be present. GCN habitats and dispersal routes are modelled in this zone.

DLL option: Developers can use DLL in amber zones. This means paying a conservation contribution to Natural England or NatureSpace instead of carrying out individual surveys.

Traditional option: Developers can still choose the traditional survey and mitigation licence route if they prefer.

What to expect if using DLL: Apply for an Impact Assessment and Conservation Payment Certificate (IACPC) from Natural England. If approved, pay the conservation contribution and submit the IACPC with your planning application. No GCN surveys required on site.

Green Zone - Low Risk

What it means: The site is in an area of lower habitat suitability. GCN may still be present, but the modelled likelihood is lower.

DLL option: Developers can use DLL in green zones. Conservation payments are typically lower than in amber zones because the modelled impact is smaller.

Traditional option: An HSI assessment of nearby ponds is still recommended. If ponds score as suitable, surveys may be needed regardless of the green zone classification.

Important note: A green zone does not mean GCN are absent. It means the modelled probability is lower. If your site has ponds or is adjacent to ponds, always seek ecological advice regardless of the zone classification.

How to Check Your GCN Risk Zone

There are several ways to find out which zone your site falls in:

MAGIC Map: Go to magic.defra.gov.uk, navigate to your site, and enable the GCN District Level Licensing Risk Zones layer. This requires knowing which layers to toggle on, which isn't always intuitive.

Natural England Open Data Geoportal: Search for "GCN Risk Zones" on naturalengland-defra.opendata.arcgis.com. Individual county-level datasets are available for download.

EcoCheck: Enter your grid reference, postcode, or coordinates into EcoCheck and the GCN risk zone classification is included automatically in your results, alongside all statutory designations and protected species records. The report builder generates a visual GCN risk assessment box colour-coded to the zone.

NatureSpace: For sites in the South Midlands, naturespaceuk.com provides an interactive risk zone map.

DLL vs Traditional Licensing: Which Should You Choose?

| Factor | DLL | Traditional Licensing | |--------|-----|----------------------| | Speed | Weeks (once IACPC approved) | Months (surveys + licence application) | | Cost | Fixed conservation payment | Variable survey costs + licence application fee | | Survey requirement | None (in amber/green zones) | 4-6 survey visits minimum | | Season dependency | Not season-dependent | Surveys only March-June | | Availability | Only in participating LPA areas | Available everywhere | | Red zone sites | Not available | Required |

For most developments in amber and green zones, DLL is the faster and more cost-effective route. The conservation payment funds strategic habitat creation that benefits GCN populations at a landscape scale - which is often better for the species than small-scale on-site mitigation.

However, some ecological consultancies prefer traditional surveys because they provide site-specific data about what is actually present. DLL relies on modelled data, which may over- or under-estimate actual GCN presence at a particular site.

What If My Site Straddles Two Zones?

Under DLL, each development site is assessed according to the highest risk zone within the development site boundary. So if your site boundary includes even a small area of red zone, the entire site is treated as red zone and DLL cannot be used.

This is why it's important to check the risk zone map carefully against your exact site boundary, not just the approximate location.

GCN and Biodiversity Net Gain

Since February 2024, Biodiversity Net Gain (BNG) is mandatory for most planning applications in England. GCN habitat creation under DLL can contribute towards BNG targets, but the two systems are separate. A DLL conservation payment does not automatically satisfy BNG requirements - you may need additional habitat creation or enhancement to meet the mandatory 10% BNG uplift.

Discuss with your ecologist how GCN mitigation and BNG requirements interact for your specific site.

Key Takeaways

1. Check your GCN risk zone early - it determines your survey requirements and licensing options. Use EcoCheck to check instantly.

2. Red zone = traditional surveys required. DLL is not available. Budget for HSI, presence/absence surveys (4-6 visits), and potentially a mitigation licence.

3. Amber and green zones = DLL is an option. Faster and often cheaper than traditional surveys. Apply for an IACPC from Natural England.

4. Green zone does not mean no GCN. If your site has or is near ponds, always seek ecological advice.

5. Plan early. Traditional GCN surveys can only be done mid-March to mid-June. If you miss the window, you wait until next year.

6. DLL and BNG are separate. Make sure your ecologist considers both requirements together.

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Patrick O'Connor is a Freelance Ecologist at Kinterra Consulting and the developer of EcoCheck - an instant ecological desktop assessment tool for any GB location. Try it free for 3 days at ecocheck.co.